A barge is a flat-bottomed boat, built mainly for river and canal transport of heavy goods. Most barges are not self-propelled and need to be moved by ...
http://en.wikipedia.org/wiki/Barge

Portable barge cover - US Patent 5850799 from Patent Storm. A portable barge cover protects cargo in the hold of a barge from contaminants such as water, ...
www.patentstorm.us/patents/5850799-claims.html

A cover for barges and the like which is formed of a relatively light weight material and is in a semi-rigid form and gains the necessary rigidity from the ...
www.freepatentsonline.com/3730128.html